WordPress multisite – I see no translation, despite available .po and .mo files?

1: I am running a WordPress multisite install with Danish as chosen language. I see a clef-da.po (and .mo) file in the /languages folder. The file appears to have most of its translation done, and yet I see no translation at all with clef installed in my multisite setting? Surely I must be missing something here, but I would’ve assumed clef to auto-translate depending on the chosen default language of the multisite install (default language for both network and relevant subsite is: Danish).

How do I “activate” the translation file correctly?

2: Regarding the actual login form area I don’t see the “-OR-” divider text and the “Log in with your phone” strings in the clef-da.po file. Do I need to hack the clef core files in some ugly fashion to force a translation of those two?

3: Why does the “-or-” divider text and “Log in with your phone” text appear between the login parameters (Username/Password) and the standard login button? This seriously disturbs the visual logic.